JPS633607Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a rice cooker that heats a pot by disposing a double annular electric heater in a heating space.

For example, in foreign countries, the commercial power supply is 200 [V], so in order to cope with this, the electric heater for export is formed into a double ring shape consisting of an inner ring part and an outer ring part, so that the commercial power supply is 200 [V]. The resistance is increased compared to the domestic version, which is 100 [V], but
In this case, the mouth part formed on the outer annular part of the electric heater has a low heat generation temperature, and since the mouth part is covered with the mounting member, there is generally little heat radiated upward from this mouth part. Therefore, the heating temperature of the bottom of the pot corresponding to the mouth part becomes low, and there is a problem in that the rice above the mouth part is cooked unevenly.

The present invention was developed in view of the above circumstances, and its purpose is to create a rice cooker that can heat the bottom of the pot, which corresponds to the mouth part, to the same level as other parts, and can cook rice evenly and evenly. It is on offer.

An embodiment of the present invention will be described below with reference to the drawings. 1 is the case of the rice cooker, which includes a reflective case 2
is installed inside. A heat-sensitive tube 3 is protruded from approximately the center of the bottom 2a of the reflective case 2, and a heat-sensitive tube 3 is disposed on the heat-sensitive tube 3, which is raised when the operating lever 4a of the operating switch 4 is pressed. It is set up. Reference numeral 6 denotes a pot having a lid 7, which is housed by having its upper end engaged with the upper edge of the reflective case 2, and heats the space between the bottom 6a of the pot 6 and the bottom 2a of the reflective case 2. It is set as space 8.
Now, 9 is an electric heater consisting of, for example, a sheathed heater, which has a double annular shape as shown in FIG. The two half-circumferential portions are defined as the outer circumferential annular portion 11. The electric heater 9 includes a boundary portion 9b between the inner circumferential annular portion 10 and the outer circumferential annular portion 11,
9b is fixed on the bottom part 2a of the reflective case 2 by the insulator 12 and the fixture 13, and the mouth part 9
a, 9a are fixed onto the bottom 2a of the reflective case 2 by the insulator 14 and the mounting member 15, and are spaced from the bottom 2a of the reflective case 2 by a predetermined distance. Furthermore, the cutting electric heater 9 aligns the center O ₁ of the outer annular portion 11 with the center of the reflective case 2, and aligns the center O ₂ of the inner annular portion 10 with the center O 1 of the outer annular portion 11 than the center O ₁ of the outer annular portion 11. 11
The mouth portions 9a formed in the opening portions 9a are provided at positions slightly shifted by a dimension L (for example, 5 mm) in the direction of the mouth portions 9a. Therefore, the electric heater 9
0a is close to the mouth parts 9a, 9a, and the distance between the inner peripheral annular part 10 and the outer peripheral annular part 11 is _G1 on the side corresponding to the mouth parts 9a, 9a, and the boundary part 9
The side corresponding to b and 9b is _G2 , and _G1 < _G2 (see Figure 3). Further, the distance between the inner circumferential annular portion 10 and the heat-sensitive tube 3 is g ₁ on the mouth portions 9a, 9a side and g ₂ on the boundary portions 9b, 9b side, and g ₁ >g ₂ (see Fig. 2).

Next, the operation of this embodiment with the above configuration will be described. First, rice soaked in water and water are placed in the pot 6, and when electricity is applied to the electric heater 9, the electric heater 9
generates heat, the pot 6 is heated via the heating space 8, and a predetermined rice cooking is performed. The center part 10a of the inner annular part 10 of the electric heater 9 is connected to the outer annular part 11.
Since the mouth portions 9a, 9a formed in bottom 6
A can be heated evenly and uneven cooking can be prevented.

If the electric heater 9 is formed into a double ring shape, the inner ring part 10 and the outer ring part 11 will deteriorate due to synergistic heating, so to prevent this deterioration, the inner ring part and the outer ring part are usually The distance from the outer circumferential annular part must be approximately 20 mm, but the mouth part 9a,
Since the heat generation temperature of 9a is low, there is no risk of deterioration due to the synergistic heating even if the central portion 10a of the inner circumferential annular portion 10 is brought close to the mouth portions 9a, 9a.

By the way, when a double ring-shaped electric heater deforms due to deterioration over time, the center part of the inner ring part is not fixed and is in a floating state, so it tends to droop downward, and this drooping part may come into contact with a heat-sensitive cylinder, etc. There is a problem that causes insulation failure in electric heaters.
According to this embodiment, the center O ₂ of the inner circumferential annular portion 10 is positioned slightly shifted by a dimension L from the outer circumferential annular portion O ₁ , that is, the center of the reflective case 2 in the direction of the mouth portions 9 a, 9 a, so that the inner circumference The center portion 10a of the annular portion 10 is sufficiently spaced from the heat-sensitive tube 3, and therefore there is less risk of the center portion of the inner circumferential annular portion 10 coming into contact with the heat-sensitive tube 3 than in the past, resulting in poor insulation of the electric heater. can be prevented as much as possible.

In the above embodiment, the center of the inner circumferential annular portion 10 is connected to the mouth portions 9a, 9a formed in the outer circumferential annular portion 11.
Although the electric heater 9 has been described in which the electric heater 9 is shifted in the direction, for example, even if the mouth part is formed in the inner circumferential annular part and the center of the outer circumferential annular part is shifted in the direction of the mouth part of the inner circumferential annular part, the same effect as in the above embodiment can be obtained. It has the effect of

Furthermore, if the double-ring-shaped electric heater 9 of the above embodiment is used in Japan for 100 [V], the life of the heater can be extended, charring can be reduced, and the rice cooking performance can be improved.

As is clear from the embodiments described above, in the present invention, the center of one annular part is shifted toward the mouth part formed in the other annular part, so that the heating temperature of the bottom of the pot corresponding to the mouth part is lower than that of the other annular parts. To provide a rice cooker that can evenly and uniformly cook rice to the same extent as the portion.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention, and FIG. 1 is a longitudinal sectional side view, FIG. 2 is a longitudinal sectional view of the main part, and FIG.
It is a sectional view taken along the line - in the figure. In the drawing, 1 is a housing, 6 is a pot, 8 is a heating space, 9
9a is an electric heater, 9a is a mouth portion, 10 is an inner annular portion, and 11 is an outer annular portion.

Claims (1)

[Scope of utility model registration request] A heating space is formed in a housing, and an electric heater for heating a pot is disposed within the heating space, wherein the electric heater is formed in a double ring shape consisting of an inner circumferential annular part and an outer circumferential annular part, A rice cooker characterized in that the center of one annular part is shifted toward the mouth part formed in the other annular part.